What are the main components of long-lasting three proof thermal paper?

The main components of long-lasting three proof thermal paper include thermal paper base layer, thermal coating layer, protective layer, as well as possible anti-static layer and anti oil layer.

Specifically:

1. Thermal paper substrate:

As the underlying structure of thermal paper, it is usually made of high-quality paper specific fabrics, providing basic load-bearing and strength for thermal paper.

2. Thermal sensitive coating layer:

It is the key layer for thermal paper to achieve color rendering function.

It is mainly composed of colorants, adhesives, and pigments. The color developer and colorless dye (or latent dye) are fixed together by adhesive. When the thermal paper encounters the thermal print head, the color developer and colorless dye undergo a chemical reaction, forming a visible printed image.

3. Protective layer:

Covering on top of the thermal sensitive coating layer, providing additional protection for the thermal paper.

The protective layer of long-lasting three proof thermal paper usually has waterproof, oil proof, alcohol proof and other properties, and some also have characteristics such as wear resistance and scratch resistance.

The protective layer may be composed of various materials, such as waterproof coatings, fireproof coatings (although long-lasting three proof thermal paper does not necessarily emphasize fire resistance, some high-end models may include this function), etc.

4. Anti static layer (optional):

Located between the thermosensitive coating layer and the protective layer, it is used to improve the anti-static ability of thermosensitive paper.

The anti-static layer may be composed of anti-static fibers (such as SP based alkyl phosphate potassium salt layer) and hydrophilic fibers (such as polyester fibers), forming a stable anti-static layer through warp and weft weaving.

5. Anti oil layer (optional):

Located on the bottom surface of the thermal paper substrate, it is used to improve the oil resistance of the thermal paper.

By adhering and fixing the anti oil layer on the bottom surface of the thermal paper substrate, it can effectively prevent the penetration and damage of pollutants such as oil and grease to the thermal paper.

Summary:

The main components of long-lasting three proof thermal paper include thermal paper base layer, thermal coating layer, protective layer, as well as possible anti-static layer and anti oil layer. These components work together to provide thermal paper with excellent properties such as long-term preservation, waterproofing, oil resistance, and alcohol resistance, meeting the needs of various application scenarios. It should be noted that different brands and models of long-lasting three proof thermal paper may have differences in specific ingredients and formulas, but their overall structure and function are similar.